boys' toys

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Products such as mechanical and electronic gadgets and gizmos, games, fast cars, motorbikes etc., that are targeted at the adult male consumer who is perceived to have at heart the same fascination with toys as young boys do.
• noun Non-consumer products involving high-tech engineering, such as rockets, submarines, helicopters etc., that are likely to interest men.